a friend tell me that this game was a very good one so I tell two other friends and the three of us register and we have not received the password and we have send the membership 28 hours ago aproximatly...please tell me what happen:

The address your computer displays as to the internet. This is one way to detect whether or not multiple accounts are being accessed from the same computer. You will be unable to join if you do not understand the multi account rules, as they are very relevant to this situation.